Ezra Is 3 Years Old

question 165

Multiple Choice

Ezra is 3 years old.He ignores people when they are in the room,and if people speak to him he does not make eye contact.He also will not initiate communication,but rather just repeats what someone has said.Finally,Ezra plays with a spinning top for hours.He just spins it,watches it,and when it stops spins it again.Ezra may be showing signs of:

• A) a learning disability.
• B) ADHD.
• C) autism.
• D) bipolar disorder.

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Definitions:

H+

Hydrogen ion, a positively charged ion of hydrogen; a measure of acidity in solutions.

Proximal Convoluted Tubule

The portion of the nephron in the kidney which is involved in the reabsorption of water, sodium, and other substances from the filtered fluid.

Cotransported

The process by which two or more substances are simultaneously transported across a cell membrane by a single carrier protein.

Sodium and Chloride

Essential electrolytes in the body that help maintain fluid balance, nerve transmission, and muscle function.